The document tells a story about a little boy who had a bad temper. His father gave him nails and told him to hammer one in the fence every time he lost his temper. Over several weeks, as the boy learned to control his anger, he hammered fewer nails each day. When he went one day without losing his temper, his father had him start pulling out nails. Eventually, all the nails were gone. However, the father showed the boy the holes still in the fence, saying angry words leave scars like the holes, even if you apologize.